header (C) fixes
Automated rebranding to Oracle copyright/license strings via filemuncher
*: s/RT_\(BEGIN|END\)_DECLS/RT_C_DECLS_\1/g
HostDrivers: __BEGIN_DECLS -> RT_BEGIN_DECLS; __END_DECLS -> RT_END_DECLS.
SUPR0IdcClientInternal.h: Shut up warning about stupid intrinsics.
Inter-Driver Communication (IDC) interface for the support driver. The client end (SUPR0IdcClient).